Variable DC power supplies are AC to DC power supplies with a variable DC output. The output can be varied with an SCR controller. The AC input power can be single phase or three phases. With single phase AC input, the DC output ripple is very high (50%). With three phase AC input, the DC output ripple is low (5%). This would be a key benefit for selecting three phase AC input instead of single phase.
The block diagram of the SCR controlled DC power supply is shown below:
The photo of the SCR controlled DC power supply, part number 18494PS is shown below:
Specifications:
- SCR Controlled Variable DC Power Supply, P/N 18494PS
- Input: 480 VAC, 360 Amps, 3 PH, 60 Hz
- Output: 400 to 750 VDC, 150 KW max, 375 Amps max
- SCR control with three muffin fans
- Voltage control and current limit are provided with manual potentiometers.
- Output filter with capacitor and inductor.
- Voltmeter and Ammeter are provided to monitor output.
- Fuses are included.
- 120 VAC control transformer is included
- ON/OFF push button capability
- E-Stop to shut off power
- Power on light
- Over temperature shut off protection
- Under Voltage protection is offered by CB1, CB2 and CB3 per customer requirements
CEHCO is a SCR controlled power supply manufacturer. To discuss your specific requirements, please contact us toll free at (800) 595-7096, or send us an email at info@cehco.com.
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